11440013 has 4 divisors (see below), whose sum is σ = 12320028. Its totient is φ = 10560000.

The previous prime is 11440003. The next prime is 11440027. The reversal of 11440013 is 31004411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31004411 = 179 ⋅173209.

It can be written as a sum of positive squares in 2 ways, for example, as 7038409 + 4401604 = 2653^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 11440013 - 2²² = 7245709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11440013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11440003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439988 + ... + 440013.

It is an arithmetic number, because the mean of its divisors is an integer number (3080007).

Almost surely, 2^11440013 is an apocalyptic number.

11440013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11440013 is a deficient number, since it is larger than the sum of its proper divisors (880015).

11440013 is an equidigital number, since it uses as much as digits as its factorization.

11440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880014.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11440013 is about 3382.3088268223. The cubic root of 11440013 is about 225.3247196171.

Adding to 11440013 its reverse (31004411), we get a palindrome (42444424).

The spelling of 11440013 in words is "eleven million, four hundred forty thousand, thirteen".